Overview
- Description
- fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.
- Source
- cve@mitre.org
- NVD status
- Modified
Risk scores
CVSS 3.0
- Type
- Primary
- Base score
- 6.1
- Impact score
- 4.2
- Exploitability score
- 1.8
- Vector string
- CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 3.6
- Impact score
- 4.9
- Exploitability score
- 3.9
- Vector string
- AV:L/AC:L/Au:N/C:P/I:P/A:N
Weaknesses
- nvd@nist.gov
- CWE-284
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D460F925-66B4-4BED-BD3B-91A8C60B8AC4",
"versionEndIncluding": "4.0.1"
}
],
"operator": "OR"
}
]
}
]